R. Heckman

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This paper discusses a novel design for a 140MHz-1GHz broad-band resonant coaxial cavity high power amplifier system developed by Redstone Technical Test Center, ETM Electromatic, Inc. and BURLE Industries, Inc. Of particular interest are the three tunable cavities and the beam power tetrode that powers the high-power stage of the amplifier. Also discussed(More)
Undergraduate STEM student enrollment has declined substantially over the last decade. Specifically there has been a steady decline in retention of early engineering students working through the first half of their degree programs. Student “leavers” typically fall into two categories (i) those facing academic difficulties and (ii) those that(More)
Many nursing programs removed perioperative education from their curriculum as early as the late 1960s, and perioperative nursing is now experiencing the consequences. Fewer perioperatively educated graduates are available, the workforce of experienced perioperative nurses is aging, and multiple career opportunities are luring perioperative nurses from the(More)
Typical plasma processing applications involve either a direct (dc) or an alternating (ac) current source provided by a generator. Plasma systems which sputter insulative materials typically use ac or RF generators, which require the designer to use different frequencies. RF is a term generally used to describe frequencies of 10,000 Hz to 1000 MHz. However,(More)
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